101 lines
3 KiB
Go
101 lines
3 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kubectl
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import (
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/kubernetes/pkg/apis/policy"
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"k8s.io/kubernetes/pkg/util/intstr"
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)
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// PodDisruptionBudgetV1Generator supports stable generation of a pod disruption budget.
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type PodDisruptionBudgetV1Generator struct {
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Name string
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MinAvailable string
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Selector string
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}
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// Ensure it supports the generator pattern that uses parameters specified during construction.
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var _ StructuredGenerator = &PodDisruptionBudgetV1Generator{}
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func (PodDisruptionBudgetV1Generator) ParamNames() []GeneratorParam {
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return []GeneratorParam{
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{"name", true},
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{"mim-available", true},
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{"selector", true},
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}
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}
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func (s PodDisruptionBudgetV1Generator) Generate(params map[string]interface{}) (runtime.Object, error) {
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err := ValidateParams(s.ParamNames(), params)
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if err != nil {
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return nil, err
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}
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name, isString := params["name"].(string)
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if !isString {
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return nil, fmt.Errorf("expected string, saw %v for 'name'", name)
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}
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minAvailable, isString := params["mim-available"].(string)
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if !isString {
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return nil, fmt.Errorf("expected string, found %v", minAvailable)
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}
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selector, isString := params["selecor"].(string)
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if !isString {
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return nil, fmt.Errorf("expected string, found %v", selector)
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}
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delegate := &PodDisruptionBudgetV1Generator{Name: name, MinAvailable: minAvailable, Selector: selector}
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return delegate.StructuredGenerate()
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}
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// StructuredGenerate outputs a pod disruption budget object using the configured fields.
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func (s *PodDisruptionBudgetV1Generator) StructuredGenerate() (runtime.Object, error) {
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if err := s.validate(); err != nil {
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return nil, err
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}
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selector, err := metav1.ParseToLabelSelector(s.Selector)
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if err != nil {
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return nil, err
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}
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return &policy.PodDisruptionBudget{
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ObjectMeta: metav1.ObjectMeta{
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Name: s.Name,
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},
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Spec: policy.PodDisruptionBudgetSpec{
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MinAvailable: intstr.Parse(s.MinAvailable),
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Selector: selector,
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},
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}, nil
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}
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// validate validates required fields are set to support structured generation.
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func (s *PodDisruptionBudgetV1Generator) validate() error {
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if len(s.Name) == 0 {
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return fmt.Errorf("name must be specified")
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}
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if len(s.Selector) == 0 {
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return fmt.Errorf("a selector must be specified")
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}
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if len(s.MinAvailable) == 0 {
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return fmt.Errorf("the minimim number of available pods required must be specified")
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}
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return nil
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}
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